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                  <p><small><a name="what_is_bz2_format"></a>PeaZip
is a free cross-platform file archiver utility that provides an unified
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proprietary software</small><small>.<br>
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP
files<br>
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RAR, UDF, ZIPX files and more,</small><small> over 200 archive types
supported</small><small><br>
Features of PeaZip includes: </small><small> </small><small>archives
opener and extractor, manage bz2 format, </small><small>batch creation
and </small><small>extraction </small><small>of multiple
archives at once, </small><small>convert files, </small><small>create
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            <td colspan="1" rowspan="1" style="vertical-align: top;"> <br>
            <h1 style="text-align: center;"><big><big><big><a
 name="bzip"></a>What is BZ2 format, BZip2 compressed files<br>
            </big></big></big></h1>
            <br>
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            <div> </div>
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                  <td style="vertical-align: top;">
                  <ul>
                    <li>
                      <p><a href="#bzip2">WHAT ARE BZ2
FILES, BZIP2 COMPRESSION ALGORITHM<br>
                      </a></p>
                    </li>
                  </ul>
                  </td>
                  <td style="vertical-align: top; width: 128px;">
                  <h2><img title="What is .BZ2 extension"
 alt="BZ2 extension" src="file-format/file-format.png"
 style="width: 96px; height: 96px;" align="right"></h2>
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 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <div style="text-align: left; color: rgb(0, 0, 0);">
            <h2><big><big><big><a name="bzip2"></a><a href="#bzip">What
are BZ2
files, BZip2 compression algorithm</a></big></big><br>
            </big></h2>
            </div>
            <br>
            <div style="text-align: left;"> </div>
            <div style="text-align: left;"> </div>
            <a name="what_is_a_bz2_file"></a><span
 style="font-weight: bold;">BZ2</span> extension
designates a <span style="background-color: rgb(255, 238, 221);">pure
data compression format not
providing file archival feature</span>, its BZip2 compression algorithm
is based on Burrows&#8211;Wheeler
transform.<br>
            <br>
            <a name="bzip2_compression_specs"></a>Compression speed is
somewhat slower than in <a href="zip-file-format.html">zip format</a>
and <a href="gzip-files.html">gzip
format</a>, which employs classic Deflate algorithm (even if correctly
implemented Bzip2
algorithm can be easily made
parallel, and benefit of recent multi-core CPU), but faster than more
powerful compression schemes as in <a href="what-is-rar-file.html">RAR
format</a>, <a href="7z-file-format.html">7Z format</a>, and new <a
 href="zipx-file-format.html">ZIPX format</a>. Compression
ratio, also, is usually intermediate between older Deflate-based ZIP/GZ
files and modern RAR, 7Z, ZIPX formats.<br>
            <br>
Compressed files are usually identified by .bz2 extension, and can
contain a single input file.<br>
Due this by-design limitation, on Unix/Linux systems BZip2 compression
(as well as Gzip, XZ,...) is usually cascaded to <span
 style="font-weight: bold;">TAR</span> archiving -&nbsp; multiple files
data
and metadata (file attributes, date/time etc) are consolidated into a
single uncompressed .tar container - producing TBZ2 file, which can be
identified with TBZ, TB2, or TAR.BZ2 extension. Hint: learn more about <a
 href="files-with-double-extension.html">files with double extension</a>.<br>
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 style="vertical-align: top; text-align: right; width: 128px;">
                  <h2><span style="font-weight: bold;"><img
 title="What is BZ2 file format, BZip2 compression algorithm"
 alt="what is a bz2 file" src="file-format/quotes.png"
 style="width: 32px; height: 32px;"></span></h2>
                  </td>
                  <td style="vertical-align: top; font-style: italic;">
                  <h3><span style="font-weight: bold;">When is BZ2
compression
recommended</span></h3>
BZip2 compression is usually applied to <a href="tar-file-format.html">TAR
archive format</a>, which is usually
employed to provide archiving of data and metadata on Unix and
Unix-like systems, and it can also be used as alternative compression
algorithm in ZIP and 7Z files - resulting archives can be read from
most file archivers (including PeaZip).<br>
It can be recommended when it is desired a better compression than
classic Deflate-based ZIP / GZIP compression, and in all cases it is
preferable an algorithm faster and less heavy on memory and CPU than
LZMA-based 7Z or PPMd-based RAR compression.</td>
                  <td style="vertical-align: bottom; width: 128px;"> <img
 title="BZ2 format features and specifications."
 alt="bz2 files features" src="file-format/quotes-inverse.png"
 style="width: 32px; height: 32px;"> </td>
                </tr>
              </tbody>
            </table>
            <a name="bz2_format_specifications"></a>Read more about
.bz2 file type on <a target="_blank" href="http://www.bzip.org/">BZip
official domain<img title="BZ2 domain" alt="BZip online"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, and <a
 target="_blank"
 href="https://en.wikipedia.org/wiki/Burrows%E2%80%93Wheeler_transform">Burrows&#8211;Wheeler
transform<img title="wiki Burrows Wheeler algorithm"
 alt="BZip2 compression" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> entry on
Wikipedia.<br>
            <br>
            <span style="font-weight: bold;"></span>PeaZip features <a
 href="bzip2-utility.html">creation and
extraction of BZ2 files</a>, can read (open, test and
extract) and write (compress to) BZ2 file type. Also, PeaZip can be set
to
use BZip2 compression as alternative algorithm for ZIP and 7Z formats,
in Advanced options tab.<br>
            <h2><img title="Bzip2 compression"
 alt="what is BZip2 compression algorithm" src="add-to-archive.png"
 style="width: 100px; height: 45px;"></h2>
            <h3><img title="BZ2 format features and specifications"
 alt="bz2 format specifications" src="extract-archive.png"
 style="width: 112px; height: 45px;"></h3>
            <br>
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 style="background-color: rgb(72, 136, 248); width: 100%; text-align: left;"
 border="0" cellpadding="0" cellspacing="1">
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                        <td style="vertical-align: top; width: 24px;">&nbsp;&nbsp;
                        <br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;">&nbsp;&nbsp;
                        <br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;">
                        <table style="width: 100%; text-align: left;"
 border="0" cellpadding="0" cellspacing="0">
                          <tbody>
                            <tr>
                              <td
 style="width: 50%; color: rgb(245, 245, 245); vertical-align: middle;">
                              <h3><big><big><big><big><big><a
 name="bz2_file_extension"></a>.BZ2</big></big></big></big></big></h3>
                              </td>
                              <td
 style="width: 50%; color: rgb(245, 245, 245); vertical-align: middle;">Author
Julian Seward, 1996<br>
limited to 1 single file as input<br>
                              </td>
                            </tr>
                          </tbody>
                        </table>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;"><big>SPEED
                        <img alt="bz2 format specs"
 title="Bzip2 compression speed" src="zip-files/star4.png"
 style="width: 80px; height: 16px;"></big><br>
BZ2 format features good speed. Designed with parallelism in mind bzip2
compression can be, theoretically,
implemented as separate threads for each input part.<br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;">
                        <h4><big>COMPRESSION
RATIO <img alt="bzip2 algorithm specs"
 title="Bzip2 compression performances" src="zip-files/star3.png"
 style="width: 80px; height: 16px;"></big></h4>
BZ2 format features good compression ratio, improved over Deflate but
lacking behind modern compression
algorithms employed in RAR and 7Z formats, recommended for backup large
quantity of data as intermediate alternative between fast zip/gzip and
powerful rar/7z compression.</td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;">
                        <h4><big>ADVANCED
OPTIONS <img alt="bzip2 features" title="BZ format options"
 src="zip-files/star1.png" style="width: 80px; height: 16px;"></big></h4>
BZ2 format is meant only for providing single-file compression, lacks
archiving and encryption features by design.<br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
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                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
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                  <td style="vertical-align: top;"><small><br>
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                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
 href="what-is-rar-file.html">WHAT IS WINRAR RAR FILE FORMAT</a><br>
                  </small></td>
                  <td style="vertical-align: top;"><small><br>
                  </small></td>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
 href="tar-file-format.html">WHAT ARE TAR TBZ TAR.BZ FILE EXTENSIONS</a><br>
                  </small></td>
                  <td style="vertical-align: top;"><small><br>
                  </small></td>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
 href="wim-files.html">WHAT IS MICROSOFT WIM FORMAT</a><br>
                  </small></td>
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            <small><small>&nbsp;</small></small><br>
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                <tr>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
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                  </small></td>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
 href="archive-file-formats-comparison.html">COMPRESSION STANDARDS AND
FORMATS
COMPARISON</a><br>
                  </small></td>
                  <td style="vertical-align: top;"><small><br>
                  </small></td>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
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 href="tar-windows.html"><br>
                  </a></small></td>
                  <td style="vertical-align: top;"><small><br>
                  </small></td>
                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
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                  <td
 style="vertical-align: top; background-color: rgb(240, 239, 238);"><small><a
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                  </a></small></td>
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            <p> </p>
            <p><a href="peazip-help-faq.html">FAQ</a>
&gt; Archive file types &gt; What are BZ2 compressed files</p>
Topics and search suggestions about what is BZ2 file format extension,
what is Bzip2 compression algorithm, what are BZ2 compressed files
features and specifications, characteristics compared to other pure
compression formats like GZ and XZ:
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="6" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;"> what is
bz2 file format,<br>
what
are bz2 files,<br>
bz2 file type specs,<br>
                  <h4>bz2 format features,</h4>
                  <h4>bzip2 compression algorithm,</h4>
                  </td>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;">
                  <h4>BZip2
files
specifications,</h4>
what are tar.bz2 files,<br>
files compressed with bz2,<br>
characteristics of bzip function,<br>
bzip2 algorithm specifications,<br>
                  </td>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;"> faq
about .bz2 extension, <br>
what is bzip2 compression algorithm,
                  <h4>bzip2 algorithm features,</h4>
bz file type<br>
                  </td>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;">
                  <h4>faq
about bzip2 compressed files,</h4>
what are bzip2 files,<br>
                  <h4>bzip2 algorithm</h4>
bzip2 compression,<br>
bzip files<br>
                  </td>
                </tr>
              </tbody>
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            <td style="vertical-align: top;">Tag Cloud <br>
            <span class="wrd free-rar4" id="bz2-extension"> <a
 href="bzip2-file.html">BZ2 format</a></span> <span
 class="wrd free-rar2" id="download-bz2-file-archiver"> <a
 href="bzip2-utility.html">BZ2 files
utility</a></span> <span class="wrd free-rar4" id="bzip2-files"> <a
 href="bzip2-file.html">BZip2</a></span> <span class="wrd free-rar0"
 id="bzip2-compressed-file"> <a href="bzip2-file.html">Burrows&#8211;Wheeler</a></span>
            <span class="wrd free-rar1" id="tbz-tar-bz2-format"> <a
 href="tar-file-format.html">TAR.BZ2 TBZ files</a></span> <span
 class="wrd free-rar3" id="bz2-files"> <a href="bzip2-file.html">what
is BZ2 file format</a></span> <span class="wrd free-rar0"
 id="create-new-bz2-tar-zip-archive"> <a
 href="how-to-compress-files-folders.html">create new archive</a></span>
            <span class="wrd free-rar3" id="gz-file-extension"> <a
 href="gzip-files.html">.GZ format</a></span> <br>
            <span class="wrd free-rar2" id="open-bz2-rar-zip-files"> <a
 href="how-to-open-rar-tar-zip-files.html">how to open bz2 rar tar zip
files</a></span> <span class="wrd free-rar1" id="7z extension"> <a
 href="7z-file-format.html">7Z extension</a></span> <span
 class="wrd free-rar0" id="file-hashing-checksum-tools"> <a
 href="verify-checksum-hash.html">checksum
hash tool</a></span> <span class="wrd free-rar1"
 id="convert-rar-zip-archive"> <a href="convert-files.html">convert
BZ2 files</a></span> <span class="wrd free-rar3"
 id="free-file-archiver-software"> <a href="index.html">free file
archiver</a></span> <span class="wrd free-rar1"
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ACE files extraction</a></span> <span class="wrd free-rar0"
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CAB file</a></span> <br>
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file</a></span> <span class="wrd free-rar1"
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 href="how-to-extract-rar-zip-archives.html">extract BZ2 TAR ZIP files</a></span>
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free RAR software</a></span> <span class="wrd free-rar0"
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to encrypt files</a></span> <span class="wrd free-rar1"
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split files</a></span> <span class="wrd free-rar2"
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files</a></span><br>
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RAR files opener</a></span> <span class="wrd free-rar2"
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 href="zip-files-utility.html">open ZIP files</a></span> <span
 class="wrd free-rar0" id="portable-rar-files-software"> <a
 href="peazip-portable.html">portable RAR TAR ZIP files software</a></span>
            <span class="wrd free-rar2" id="what-is-rar-file-extension">
            <a href="what-is-rar-file.html">RAR file format</a></span> <span
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delete</a></span> <span class="wrd free-rar3"
 id="windows-tar-files-viewer"> <a href="tar-windows.html">TAR.BZ2
file extraction</a></span> <br>
            <span class="wrd free-rar2" id="what-is-zip-file-type"> <a
 href="zip-file-format.html">what is
ZIP format</a></span> <span class="wrd free-rar1"
 id="file-compression-utility"> <a href="index.html">file compression
utility</a></span> <span class="wrd free-rar0" id="extract-zipx-files">
            <a href="zipx-files-software.html">extract ZIPX archives</a></span>
            <span class="wrd free-rar3" id="file-compression-benchmark">
            <a href="peazip-compression-benchmark.html">file
compression benchmark</a></span> <span class="wrd free-rar1"
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 href="what-is-solid-compression.html">solid compression option</a></span>
            <span class="wrd free-rar2" id="gzip-utility"> <a
 href="gzip-utility.html">GZip utility</a></span> <br>
            <span class="wrd free-rar0" id="what-is-compressed-file"> <a
 href="what-is-zip-file.html">what is a compressed file</a></span> <span
 class="wrd free-rar1" id="archive-formats-comparison"> <a
 href="archive-file-formats-comparison.html">archive
format comparison</a></span> <span class="wrd free-rar3"
 id="pea-file-format"> <a href="pea-file-format.html">PEA encrypted
file format</a></span> <span class="wrd free-rar0"
 id="linux-file-compression-utility"> <a href="peazip-linux.html">linux
file compression utility</a></span> <span class="wrd free-rar3"
 id="windows-tar-files-opener"> <a href="tar-windows.html">TAR files
opener</a></span> <br>
            <span class="wrd free-rar1"
 id="stongest-file-compression-algorithms"> <a
 href="peazip-compression-benchmark.html">strongest compression
algorithms</a></span> <span class="wrd free-rar2"
 id="tar-zip-maximun-input-files-limit"> <a
 href="rar-zip-file-format-size-limitations.html">max number of files
in 7Z RAR TAR ZIP archives</a></span> <br>
            </td>
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            <td style="vertical-align: top; width: 25%;"><small> <img
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